I have a Surface Pro 2, Surface Pro 4, Hama mini displayport to hdmi adapter, lg ultrawide display, hdmi-hdmi cable.
For years now I have been using my Surface Pro 2 with this configuration and I get a full 2560x1080 resolution with crisp image quality.
Recently I got a Surface Pro 4 and tried plugging the same thing to it (mini displayport adapter to hdmi, plugged in to 21:9 monitor using hdmi cable). Unfortunately I'm only getting 1920x1080 and the image quality is also quite fuzzy. I updated all the
drivers, I even tried forcibly installing the newest drivers for Iris 540, but to no avail.
I also tried different cable (dvi-hdmi). This used to work with my Surface Pro 2 but didn't work with Surface Pro 4.
Last thing I tried is plugging to a 1920x1200 monitor and it seemed to work fine (native resolution, crisp image).
Judging from the fact that it works with my Surface Pro 2 I don't thing that the adapter is faulty, so there probably is some problem with Surface Pro 4 (maybe newer mini displayport connection or something).
Do you have any solutions for this?